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Chin. Phys. B, 2020, Vol. 29(12): 124703    DOI: 10.1088/1674-1056/abb7ff
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Revealing stepping forces in sub-mg tiny insect walking

Yelong Zheng(郑叶龙)1, Wei Yin(尹维)2, Hongyu Lu(鲁鸿宇)2, and Yu Tian(田煜)2,
1 State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China; 2 State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
Abstract  Measuring walking forces of small or tiny insects can help the comprehension of their locomotion principles. However, as their size and force are generally too small, walking forces of small insects in sub-mg mass have never been actually measured. In this work, a convenient multi-lens and jelly surface based shadow method was developed for simultaneous multiple walking forces measuring, ranged from nN to mN with a sensitivity of sub-nN/pixel under ambient conditions. Walking force of six legs of a 0.3 mg water treader was demonstrated. The obtained results disclosed a rapid and extending middle leg strategy of water treader in walking forward above a jelly surface. This method is cost-effective and high-resolution, which could be easily used in measuring other tiny forces.
Keywords:  tiny force      shadow      walking forward      bean jelly  
Received:  05 August 2020      Revised:  08 September 2020      Accepted manuscript online:  14 September 2020
PACS:  47.55.df (Breakup and coalescence)  
  47.55.D- (Drops and bubbles)  
  68.03.-g (Gas-liquid and vacuum-liquid interfaces)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51323006 and 51425502).
Corresponding Authors:  Corresponding author. E-mail: tianyu@tsinghua.edu.cn   

Cite this article: 

Yelong Zheng(郑叶龙), Wei Yin(尹维), Hongyu Lu(鲁鸿宇), and Yu Tian(田煜) Revealing stepping forces in sub-mg tiny insect walking 2020 Chin. Phys. B 29 124703

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